S
M
T
W
T
F
S
30
73°
52°
31
72°
51°
1
72°
52°
2
73°
53°
3
71°
54°
4
70°
52°
5
73°
52°
6
72°
52°
7
70°
50°
8
71°
49°
9
69°
50°
10
70°
55°
11
69°
49°
12
69°
49°
13
71°
48°
14
72°
54°
15
71°
54°
16
70°
51°
17
67°
47°
18
67°
46°
19
68°
47°
20
72°
53°
21
68°
47°
22
66°
49°
23
71°
51°
24
70°
52°
25
71°
50°
26
67°
43°
27
68°
44°
28
62°
43°
29
61°
42°
30
61°
43°
1
Hist. Avg.
73°
54°
2
Hist. Avg.
72°
54°
3
Hist. Avg.
72°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Montebello
Montebello's September 2026 forecast shows daily high temperatures ranging from 61° to 73°, with overnight lows between 42° and 55°. The average high for September is 69° with an average low of 50°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how September weather will actually feel in Montebello. See also: October | November | December.
